Machine for depositing plastic or semiliquid substances such as chocolate



Jan. 15, 1929. 1,699,447

W. E. PRESCOTT MACHINE FOR DEPOSITING PLASTIC OR SEMILIQUID I SUBSTANCESSUCH AS CHOCOLATE Filed Oct. 10, 1927 2 Sheets-Sheet 1 Jan. 15, 1929. 1,699,447

W. E. PRESCOTT MACHINE FOR DEPOSITING PLASTIC OR SEMILIQUID SUBSTANCESSUCH AS CHOCOLATE Filed Oct. 10, 1927 2 Sheets-Sheet 2 five/17077.-

Mul/r/v 155mm: fie-salon Patented Jan. 15, 1929.

WILLIAM EDW'ABD EPItESCOTT, 0F LONlDfirl,

ENGLAND, .ASSIGNQR T0 BAKER PERKINS C0. 1110., OF SAGINAKF], MICHIGAN. 1

ItIACI-iINE FOB. DEPOSI'EIENG PLASTIC OR SEIYEILIQUED Application filedOctober 10, 1-927, Serial No. 225,275, and. in Great Britain November 8,1926.

This invention relates to machines for depositing plastic or semi-liquidsubstances, such chocolate, of that type which embodies or includes acontainer for the substance, a measuring chamber within the containerand communicating with the interior thereofla reciprocating plungerwithin said chamber adapted to be operated on one stroke to allow adefinite or measured quantity of substance from the container to entersaid chamber and on the opposite stroke to expel said substance througha depositing or discharge orifice or nozzle, and a valve operat ing intimed relation with the plunger for opening and closing said orifice ornozzleat the required times.

The principal feature of the prises a construction in which the plungerin its movements opens and closes a port or ports through which thesubstance flows from the container to the measuring chamber and in whichthe valve is in the form of a rod or equivalent and passes through theplunger.

The invention also comprises improved actuating and controlling meansfor the plunger and valve whereby the movements of these elements arecontrolled in required time relation by independent actuating means oneor both of which is capable of adjustment to ensure or vary said timerelation according to requirements. The invention further comprisesother, features of construction, arrangement and combination of parts ashereinafter fully described.

in the accompanying drawings Fi 1 is a front elevation of the improvedmachine with parts in section; Fig. 2 is a side elevation with thecontainer broken away, and Fig. 3 is a detail view of part of themeasuring chamber.

In the following description the substance to be deposited will bereferred to as chocolate for which the present embodiment isparticularly adapted, but it will be obvious that any other plastic,semi-fluid or moistened substances can be equally well dealt with.

In said drawings, a designates a container for the chocolate suitablyprovided with a double wall a and having a double bottom containingelectric heating devices a controlled as by a switch a for varying thedegree of heat. A jacket for containing a tempering medium such as warmwater could be used in place of the heating means described.

The base of the container is shown as deinvention com pressed at o forleading thechocolate to a port or ports 0 in the wall of a tubiiilarmeasuring chamber 0 which may extend the full height the container andis fitted below with a screw cap 0 provided with a discharge orifice ornozzle 0*. l fithin the measuring i uber c is a plunger (Z actuated by acon rod (Z adjustably connected to a t (Z? mounted on a, main drivingshaft 6 driven as. by pulley 6 The adjustable connection of the rod almay as shown in Fig. 2, comprise a slotted guide (Z carried by the disk(Z in which guide may slide the pivot (i of the connecting rod under theaction or a screw spindle (Z working with in a bearing or block (Zi. Anyother suitable means may however be user. The plunger is guided in itsmovements by blocked working in slots (Z in the wall of chamber 0.

Extending through the chamber 0 and plunger (Z is a valve 7 in the formof a rod operated by a cam 7 on driving shaft 6 and a bell crank lever finterposed between said cam and valve. Any convenient means foradjusting the stroke of the valve may be provided if desired. The valveis opened by the cam and closed by a spring 7' coiled about its upperend and bearing against a pin f and frame part 7.

The device shown is completed by stirring arms or members 9 within thecontainer (1, these arms being mounted'on a shaft 9 drivon through bevelgears g g from the shaft 6, the gears being housed in a casing 9 forprotection and purposes of lubrication. The operation of the apparatusmay be controlled by a clutch or coupling h in shaft 0 controlled byhand lever 7L l/Vith the parts in the position shown in Figs. 1 and 2,the plunger d is at the lower end of its stroke and the valve f isclosed. On the upstroke of the plunger and when it rises above theinside level of the container at the point i, that is, when the port orports 0 are exposed, the chocolate fiows into the measuring chamber 0through said port or ports, the valve remaining closed during suchmovement of the plunger. hen the plunger again descends to the point z'on its downward stroke, the valve f is caused to open, and furthermovement of the plunger discharges the measured contents in chamber 0through the orifice c Immediately the plunger cominences its upstroke,the valve is again closed.

"What I claim as my invention and desire SUCH AS GHOCGLATE.

to secure by Letters Patent of the States is 2*- l. A depositing machinecomprising a container, a measuring cylinder Within the container havinga lateral entrance port intermediate its ends through Which thesubstance to be deposited may pass from the container directly into themeasuring chamber and also having an outlet in its end, a plungermovable in said cylinder, the stroke of said plunger extending fromabove the aforesaid port to near the outlet end oi said cylinder, and avalve rod movable through the plunger in opposite directions into andout of position to close said outlet.

2. A depositing machine comprising a corn tainer, a measuring cylinderhaving a lateral entrance port intermediate its ends through which thesubstance to be deposited may pass from the container to the measuringchamber and also having an outlet in its end, a plunr movable in saidcylinder, the stroke oil said plunger extending from above the aforesaidport to near the outlet end of said cylinder, a valve rod for the saidoutlet passing through the plunger,

United a crank disk, a connecting rod for said plunger adjustahlymounted on said crank disk, a cam for operating said valve in onedirection, a spring for retracting said valve, and a common drivingshaft on which said disk and cam are mounted.

3. A depositing machine comprising a container, a measuring cylinderhaving a lateral entrance port intermediate its ends through which thesubstance to be deposited may pass from the container to the measuringchamber and also having an outlet in its end,- a' plunger movable insaid cylinder, the stroke of said plunger extending from above theaforesaid port to near the outlet end of said cylinder, and a valve rodmovable through the plunger in opposite directions into and out ofposition to close said outlet, the measuring chamber beingcontainedwithin and exten ing for the entire height of the container andbelow the same and communicating directly with said container by meansof the said entrance port.

4-. A depositing machine comprising a container for the substance to bedeposited, a measuring chamber in controllable communication therewithand provided at its bottom with a discharge orifice, a i' ilungerWorking in said chamber forcontrolling the communication between thelatter and the container, a valve rod for said orifice passing throughthe plunger, a crank disk, a connecting rod for s v mounted on saidcrank disk, a cam for operating said valve in no direction, a spring forretracting said valve,-and acominon driving shaft on which said disk andcam are mounted.

d plunger adjustahhr In Witness whereof I have si ned this secification.

XVILLIAM EDXVARD PRESCOTT.

